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authorAlexander Duyck <alexander.h.duyck@intel.com>2009-12-23 13:21:27 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-23 20:47:50 -0800
commitd405ea3ef2499eb46834418a643973c884ff7f30 (patch)
tree4dafb0895c615a8062602e881be4eec809c04446 /drivers/net/igb
parent8c6af2995c14e71558c312b86955ae32272a03d8 (diff)
downloadblackbird-op-linux-d405ea3ef2499eb46834418a643973c884ff7f30.tar.gz
blackbird-op-linux-d405ea3ef2499eb46834418a643973c884ff7f30.zip
igb: correctly offset 82575 flow control watermarks by 16 bytes
The watermark values for the 82575 were not being set correctly. As a result the high and low watermark values were set to the same value which can lead to excess xon/xoff packets being generated. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/igb')
-rw-r--r--drivers/net/igb/igb_main.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 78963a0e128d..933c64ff2465 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1306,13 +1306,8 @@ void igb_reset(struct igb_adapter *adapter)
hwm = min(((pba << 10) * 9 / 10),
((pba << 10) - 2 * adapter->max_frame_size));
- if (mac->type < e1000_82576) {
- fc->high_water = hwm & 0xFFF8; /* 8-byte granularity */
- fc->low_water = fc->high_water - 8;
- } else {
- fc->high_water = hwm & 0xFFF0; /* 16-byte granularity */
- fc->low_water = fc->high_water - 16;
- }
+ fc->high_water = hwm & 0xFFF0; /* 16-byte granularity */
+ fc->low_water = fc->high_water - 16;
fc->pause_time = 0xFFFF;
fc->send_xon = 1;
fc->current_mode = fc->requested_mode;
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